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Titolo:
SPATIAL-ANALYSIS OF MICROGEOGRAPHIC GENETIC-STRUCTURE IN RICHARDSONS GROUND-SQUIRRELS
Autore:
VANSTAADEN MJ; MICHENER GR; CHESSER RK;
Indirizzi:
GRAZ UNIV,INST ZOOL,UNIV PL 2 A-8010 GRAZ AUSTRIA TEXAS TECH UNIV,DEPT BIOL SCI LUBBOCK TX 79409 TEXAS TECH UNIV MUSEUM LUBBOCK TX 79409 UNIV LETHBRIDGE,DEPT BIOL SCI LETHBRIDGE AB T1K 3M4 CANADA
Titolo Testata:
Canadian journal of zoology
fascicolo: 7, volume: 74, anno: 1996,
pagine: 1187 - 1195
SICI:
0008-4301(1996)74:7<1187:SOMGIR>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUTO-CORRELATION ANALYSIS; AUTOCORRELATION ANALYSIS; SEXUAL DIFFERENCES; PLANT-POPULATIONS; MATING SYSTEM; DIVERSITY; PATTERNS; DISPERSAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
M.J. Vanstaaden et al., "SPATIAL-ANALYSIS OF MICROGEOGRAPHIC GENETIC-STRUCTURE IN RICHARDSONS GROUND-SQUIRRELS", Canadian journal of zoology, 74(7), 1996, pp. 1187-1195

Abstract

Local genetic structure has a sound theoretical basis, yet empirical demonstration in animal species has proved elusive, even in apparentlyideal candidate species. Techniques based on the distribution of individual genotypes may offer a more complete picture of population structure than traditional measures focusing on isolation by distance and dispersal behavior. We used spatial autocorrelation and contiguous clustering to identify structure in a population of Richardson's ground squirrel (Spermophilus richardsonii) for which deviation from Hardy-Weinberg expectations indicated population subdivision. Nonrandom aggregates of genotypes were detected at five of six enzyme loci examined and selection at one locus. Genetic structuring was highly sex-dependent, being prominent only among females. Isolation by distance cannot account for the patterns of gene diversity observed, but Mantel matrix procedures of inter-individual distance based on demographic-behavioral characteristics and geographic distance were significantly associated. Social and breeding systems of S. richardsonii lead to significant local substructure. While philopatry alone may not account for fine-scale genetic structure in small mammals with sex-biased dispersal, nonrandom aggregates will be detected if appropriate social models and rigorous sampling criteria are adopted. Identification of such localized structure remains fundamental to understanding evolutionary models of population genetic structure and sociality.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 22:39:50